Whatever you do, WH, don't let your H know you know about things. Assume he does, but don't say anything or let him bait you into it. If I was your L, I would let the flagrant disregard build up until I had so much overwhelming evidence of your H's nuttiness and disregard for the courts, that the courts look for a reason to stick him with everything they can possible stick him with. I think that's where he's headed. Don't be impatient or attempt to protect or get even with him. Firm boundaries. Like you would with any 2 year old...
As for your son. It may be worth it to find another counselor and see if your son is willing to talk to somebody new. I suspect he is willing to try somebody if you ask him.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."